Salts of high molecular fatty acids containing arsenic and a halogen.



EMIL rrscnnn, or BERLIN, GERMANY, Assmnon To 'sYuTHnTm PATENTS 'eo., two, or new term, n. Y., A conroRATIoN or NEW YORK.

SALTS'OF HIGH MOLECULAR, FATTY horns conTamrne ARSENIC Anna HAnoen-n'.

No Drawing.

specification of Letters Patent.

Application filed August 121, 1913. Serial No. 784,379.

Patented June 30, 191%.

. zen of the German Empire, residing at Berlin, Germany, have invented new and useful Improvements in Salts of High Molecular Fatty Acids Containing Arsenic and a Halogen, of which the following is a specification.

This invention'relates to salts of high molecular fatty acids containing arsenic; and it comprises such salts as the calcium, strontium, and viron salts of high molecular fatty acids, particularly of the unsaturated higher fatty acids such as stearolic and behenolic, containing. both arsenic and a hal ogen such as chlorin or bromin; more specifically it comprises the calcium, strontium, and iron salts of the nhlorarsenobehenolic acid, all as more fully hereinafter set forth and claimed.

The present application is in part a continuation of my prior application, Serial No. 717247, filed August 27, 1912, in which I have claimed generically the high molecular fatty acid compounds containing arsenic and halogen.

The novel products claimed in the present application can be preparedfrom the hal-' ogen arseno fatty acids such as chlor'arseno-' g the air. The calcium salt contalns about 11 behenolic acid by treatment with the metal 'salts in alcoholic solution. These novel products are insoluble or diflicultly solublein water, are decomposed by mineral acids inventionand their method of preparation Eat-ample 1 -8'trontium salt of chlomrsenobeluanolic acid.100 parts of crude free chlorarsenobehenolic acidare dissolved in 1600 parts of methylic alcohol, and the solution is carefully diluted with water until a' turbidlity sets in which just remains permanent. The liquid is allowed to stand for about one day and then the clear solution .pouredf'oflf from the dark colored precipitate. The thus obtained light red solution of the free chlorarsenobe enolic and is allowed to run into a solution of 40' parts of chlorid of strontium in 200 parts of methylic alcohol to which 20 parts of alcoholic ammonia containing 17 per cent. of ammonia are added. This-addition is made at about 0 to 5 while constantly stirring; in this way the strontium salt of chlorarsenobehenolic acid is precipitated as an almost colorless thick paste. After standing for a short time it is filtered ofi', washed with alcohol, water, acetone and ether anddri'eol by exposure to air. It forms an almost colorless powder, almost insoluble in water and organic solvents and decomposed by dilute mineral acids, forming free chlorarsenobehenolic acid. The strontium salt contains about 13.5 per cent. of arsenic and 6.3. percent. of chlorin. V

Ewample 2'0ctlcit0m salt 0 cklo'mrsenobehenolic acid.-A solution of parts of chlorarsenobehenolic acid in 200 parts of absolute alcohol is added to a solutionof 50 parts of crystallized chlorid of calcium in 2000 parts of absolute alcohol, to which sulficient ammonia is addedv to make a 2% normal solution. The addition is made at a temperature of ]10 whileconstantly stirring- T e salt at, first precipitatesv in a somewhat pasty form, but after standinlg for about '2 hours it can be filtered oil". is then, stirred into dilute 50 per cent. alcohol, filtered ofl, stirred with water, filtered, washed with alcohol and dried in per cent. of arsenic acid and 510. per cent. of chlorin.

.Ewample 3-lron salt of ,cklorarsnobehe'nolz'c acid.60 parts, of chlorarsenobeheno- I lie acid are dissolved in 400 parts of alcohol and while stirring added to a mixture'of 1200 parts of basic ferric oxychlorid solution (the liquor ferri oxychlorati dialysati of the Ger-- man Pharmacopoeia, 5th edition) and 1200 parts of alcohol. In thls way a red-brown precipitate is obtained whlch is the basic iron salt of chlorarsenobehenolic acid. The

precipitate is filtered ofl', repeatedly stirred with alcohol and filtered. It is first dried by exposure to air and later at 60. The product formsa brown powder, insoluble in water and alcohol w ich is decomposed by mineral acid. It contains about 33.33 per cent. of iron and 5.37 per cent. of arsenic. The r quantities of chlorarsenobehenolic acid and ofiron solution may be varied and in this we roducts may be obtained which show a i emit-ratio of iron and arsenic.

Instead of the above liquid iron preparation, basic acetate of iron, or chlorid of iron, or other, iron salts may be employed.

I claim l. The herein described new salts of high molecular fatty acids containing arsenic and halogen, which salts are substantially insoluble in water, decomposed by mineral acids into free halogenarseno fatty acid, and which retain the valuable therapeutic properties of the free acid, substantially as described.

2. The herein described new salts of high molecular fatty acids containing arsenic and chlorin, which salts are substantially insoluble in water, decomposed by mineral acids into the free chlorarseno fatty acid and which retain the valuable therapeutic properties of the free acid, substantially as described.

3. The herein described new salts of chlorarsenobehenolic acid, which salts are. substantially insoluble in water, decomposed by mineral acids into the free chlorarsenobehenolic acid, and which retain the valuable therapeutic properties of the free acid, sub

stantially as described.

4c. The herein described new salts of divalent metals of the calcium groups of high molecular fatty acids containing arsenic and halogen, which salts are substantially insoluble in water, decomposed by mineral acids into free halogenarseno fatty acid, and which retain the'valuable therapeutic properties of the free acid, substantially as described.

5. The herein described new salts of divalent metals of the calcium groups of high molecular fatty acids containing arsenic and chlorin, which salts are substantially insoluble in water, decomposed by mineral acids into the free chlorarseno fatty acid, and which retain the valuable therapeutic properties of the free acid, substantially as described.

6. The herein described new salts of divalent metals of the calcium group of behenolicacid containing arsenic and halogen, which salts are substantiall insoluble in water, decomposed by minera acids into the free halogenarsenobehenolic acid, and which retain the valuable therapeutic properties of the free acid, substantially as described.

7. The herein described new salts of divalent metals of the calcium group of behenolic acid containing arsenic and chlorin,

which salts are substantially insoluble in water, decomposed by mineral acids into the free chlorarsenobehenolic acid, and which retain the valuable therapeutic properties of the free acid, substantially as described.

8. The herein described new strontium salt of chlorarsenobehenolic acid, which is substantially insoluble in water and organic solvents, decomposed by dilute mineral acids setting free the chlorarsenobehenolic acid, and retaining the valuable therapeutic properties of the free acid, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses. I

EMlL' FISCHER. Witnesses: HENRY HASPER,

ARTHUR SCHROEDER. 

